CN108664209A - Storage system and its read method and wiring method - Google Patents
Storage system and its read method and wiring method Download PDFInfo
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- CN108664209A CN108664209A CN201710197249.XA CN201710197249A CN108664209A CN 108664209 A CN108664209 A CN 108664209A CN 201710197249 A CN201710197249 A CN 201710197249A CN 108664209 A CN108664209 A CN 108664209A
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- user data
- memory
- storage system
- heating
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
- G06F3/0608—Saving storage space on storage systems
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0638—Organizing or formatting or addressing of data
- G06F3/0644—Management of space entities, e.g. partitions, extents, pools
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
- G06F3/0671—In-line storage system
- G06F3/0673—Single storage device
- G06F3/0679—Non-volatile semiconductor memory device, e.g. flash memory, one time programmable memory [OTP]
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Techniques For Improving Reliability Of Storages (AREA)
Abstract
A kind of storage system and its read method and wiring method.Storage system includes a master controller, a Memory Controller and a memory array.Memory Controller is electrically connected at master controller.Memory array is electrically connected at Memory Controller.Memory array includes multiple memory devices.Position information and a control table are stored in memory array together.Read method includes the following steps：A reading order is received from a host interface, reading order is asking the user data for being stored in memory array.When user data is in one of these memory devices generation mistake, according to same position information, (recover) user data is restored.The user data restored is transmitted to host interface, and updates the user data of (refresh) mistake simultaneously.
Description
Technical field
The invention relates to a kind of storage system, a read method and a wiring methods, and in particular to one
Kind storage system and its read method and wiring method.
Background technology
In recent years, storage device can apply independent disk redundant array technique (Redundant Array of
Independent Disks, RAID) come data degradation caused by avoiding disk failures.On the other hand, many applications use
RAID technique is realized such as nand flash memory (NAND flash), to enhance its effect.
Since nand flash memory has the problem of interference (disturbance) and retentivity (retention), nand flash memory
Effect will will generate decline after long-time use.
Furthermore after mass data is written, nand flash memory will consume (wear out), and cause no space can be more
New data or the mistake for causing data.
Invention content
Present invention is directed to a kind of storage system and its read methods and wiring method.
According to the first aspect of the invention, a kind of read method of storage system is proposed.Storage system is deposited including one
Memory controller and a memory array.Memory array is electrically connected at Memory Controller.Position information storage is being deposited together
Memory array.Memory array includes multiple memory devices.Read method includes the following steps：One is received from a host interface
Reading order, reading order is asking the user data for being stored in memory array.When user data is in these memories
When mistake occurs for one of device, according to same position information, (recover) user data is restored.Transmit the user restored
Data update (refresh) user data to host interface.
According to the second aspect of the invention, a kind of wiring method of storage system is proposed.Storage system is deposited including one
Memory controller and a memory array.Memory array is electrically connected at Memory Controller.Position information storage is being deposited together
In memory array.Memory array includes multiple memory devices.Wiring method includes the following steps：Receive a writing commands.
Writing commands are being written a user data in memory array.Multiple pages (page) of memory array are distributed to store use
User data.If these assigned pages can not be into line access, in addition to can not be into one of these memory devices
Outside the memory device page of line access, user data and its corresponding same position information are stored in these pages.A heating is executed to repair
Multiple program (heating repair operation) is in can not be into the memory device of line access.It is completed in heating repair procedure
Afterwards, user data is restored to memory array.
According to the third aspect of the invention we, a kind of storage system is proposed.Storage system includes a Memory Controller
An and memory array.For position information storage in memory array, memory array includes multiple memory devices together.Control table
Including a update list.When a user data is in one of these memory devices generation mistake, there is user data
Mistake memory device an identifier record update list.
In order to which the above-mentioned and other aspect to the present invention has a better understanding, preferred embodiment cited below particularly, and coordinate institute
Attached drawing is described in detail below：
Description of the drawings
Fig. 1 is painted the schematic diagram of the storage system according to an embodiment.
Fig. 2 and Fig. 3 illustrates an embodiment of the read method of storage system.
Fig. 4 illustrates another embodiment of the read method of storage system.
Fig. 5 and Fig. 6 illustrates an embodiment of the wiring method of storage system.
Fig. 7 is painted the flow chart of the read method of the storage system according to an embodiment.
Fig. 8 is painted the flow chart of the wiring method of the storage system according to an embodiment.
Fig. 9 is painted the flow chart of the step S218 of Fig. 8.
Figure 10 is painted the flow chart of the step S314 of Fig. 8.
【Symbol description】
1000：Storage system
100：Master controller
200：Memory Controller
300：Memory array
310：Memory device
400：Data buffer
500：Same bit location
600：Host interface
A1、A2、A3、B1、B2、B2*、B3、Bx、C1、C2、Cx、D1、D2、D3、Dx：User data
Ap、Bp、Cp、Dp：With position information
L1：Update list
L2：List is repaired in heating
L3：Restore list
S102、S104、S106、S108、S110、S112、S114、S116、S118、S120、S122、S202、S204、
S206、S208、S210、S212、S214、S216、S218、S220、S302、S304、S306、S308、S310、S312、S314、
S402、S404、S406、S408、S410：Process step
TB：Control table
Specific implementation mode
Fig. 1 is please referred to, the schematic diagram of the storage system 1000 according to an embodiment is painted.Storage system 1000
An e.g. independent disk redundant array (Redundant Array of Independent Disks, RAID) memory system
System.Storage system 1000 includes 100, one Memory Controller (memory of a master controller (main controller)
Controller) 200, one memory array (memory array), 300, one data buffer (data buffer) 400, one
Same bit location (parity unit) 500 and a host interface (host interface) 600.Master controller 100 comes to receive
From in the order of host interface 600, and accordingly control memory controller 200.Memory Controller 200 is being stored
Device array 300, data buffer 400 and access and operation with bit location 500.For example, master controller 100 and memory
Controller 200 is, for example, a storage device of a circuit, a chip, a circuit board or storage array program code.
Data buffer 400 is configured to temporarily store the user data from host interface 600 or memory array 300.Citing comes
It says, data buffer 400 can be nonvolatile memory (NVRAM), e.g. DRAM or SRAM.
With bit location 500 distributing same position information or carry out recovery program (recovering according to same position information
procedure).For example, it is, for example, the storage dress of a circuit, a chip or storage array program code with bit location 500
It sets.
Memory array 300 includes multiple memory devices 310.Memory array 300 storing number of users for a long time
According to.Memory device 310 is, for example, to form a RAID data structure.It is stored in memory array with position information and user data
310 different zones.User data may generate mistake in a certain memory device 310.The user data of mistake can root
According to same position information and it is stored in the user data of other memory devices and restores.For example, memory device 310 can be
One nonvolatile storage (NVRAM) or flash memory (flash), e.g. a nand flash memory.
Fig. 2 and Fig. 3 is please referred to, illustrates an embodiment of the read method of storage system 1000.As shown in Fig. 2, one
Control table TB includes that a update list L1, a heating reparation list L2 and one restore list L3.Control table TB can be stored in
In memory array 300, or it is stored in another nonvolatile storage.
As shown in Fig. 2, memory array 300 to store user data A1, A2, A3 ..., B1 ..., Bx, C1,
C2 ..., Cx and with position information Ap, Bp, Cp.The memory device 310 that identifier is " #1 " is stored in store user data
A1, user data B1 and user data C1.Identifier is the memory device 310 of " #2 " storing user data A2, user
Data B2 and with position information Cp.Identifier be " #3 " memory device 310 to store user data A3, user data C2 and
With position information Bp.Identifier be " #x+1 " memory device 310 to store user data Bx, user data Cx and with position believe
Cease Ap.
As shown in Fig. 2, user data B1 to user data Bx is intended to be read out.First, user data B1 is to number of users
It must be read to data buffer 400 according to Bx.However, being stored in the user data for the memory device 310 that identifier is " #2 "
B2* is wrong.Then, following formula (1) can be executed with bit location 500, with according to position information Bp, user data B1, user
Data B3 ..., user data Bx reflex original subscriber's data B2* be user data B2.In another embodiment, program is restored simultaneously
It is not limited to following formula (1).
After user data B2 is reconditioned, user data B2 is stored in data buffer 400, and identifier " #2 " is stored in
The update list L1 of control table TB.
Then, as shown in figure 3, the user data B1 to user data Bx for being stored in data buffer 400 can be completely
It is read to host interface 600." #2 " is recorded in update list L1, therefore with bit location 500 by above formula (1) come more new identifier
For the user data B2* of the memory device 310 of " #2 ".Thus, which even if user data B2* is wrong, user data
B1 to user data Bx still can be successfully read and update.
Fig. 4 is please referred to, illustrates another embodiment of the read method of storage system 1000.As shown in figure 4, identifier
It can not be accessed for the memory device 310 of " #3 ".Other than user data C2, user data C1 to user data Cx is read
Data buffer 400 is got, and same bit location 500 is read into position information Cp.
Then, following formula (2) can be executed with bit location 500, with according to position information Cp, user data C1, user data
C3 ..., user data Cx obtain user data C2.In another embodiment, it restores program and is not limited to following formula (2).
After obtaining user data C2, user data C2 is stored in data buffer 400, and the memory that can not be accessed
List L2 is repaired in the heating that the identifier " #3 " of device 310 is recorded in control table TB.
Then, as shown in figure 4, the user data C1 to user data Cx for being stored in data buffer 400 can be completely
It reads to host interface 600." #3 " is then recorded in heating and repairs list L3, therefore the memory device 310 that identifier is " #3 " will
It is performed a heating repair procedure (heating repair procedure).Thus, even if a certain memory device 310
It can not be accessed, user data C1 to user data Cx still can smoothly be read out, and this memory that can not access
Device 310 can be repaired by the repair procedure that heats up.
Fig. 5 and Fig. 6 is please referred to, illustrates an embodiment of the wiring method of storage system 1000.It is slow to be stored in data
The user data D1 of storage 400, user data D2, user data D3 ..., user data Dx will be written into memory array
300.Can execute following formula (3) with bit location 500, with according to user data D1, user data D2, user data D3 ..., use
User data Dx obtains same position information Dp.
As shown in figure 5, the memory device 310 that identifier is " #3 " can not be accessed.Other than user data D2, use
User data D1 to user data Dx is written to memory array 300, and is also written to memory array 300 with position information Dp.And
And the memory device 310 that identifier is " #3 " is performed heating and repairs into program.
As shown in fig. 6, after the completion of heating up repair procedure, " #3 " is moved into the restoring list L3 of control table TB.Then,
" #3 " is recorded due to restoring list L3, therefore following formula (4) is executed with bit location 500, with according to user data D1, user data
D3 ..., user data Dx and obtain user data D2 with position information Dp.Then, user data D2 is stored back to memory array
Row 300.
Thus, even if a certain memory device 310 can not be accessed, user data D1 to user data Dx still can be with
It is smoothly written into memory array 300, and memory device 310 can be repaired by the repair procedure that heats up.
Fig. 7 is please referred to, the flow chart of the read method of the storage system 1000 according to an embodiment is painted.In step
In S102, Memory Controller 200 receives the reading order from host interface 600, this reading order is reading memory
The user data of array 300.Memory Controller 200 simultaneously reads user data to data buffer 400.
In step S104, judge whether user data can not correctly be obtained in a certain memory device 310
(unavailable).In oneainstance, the reason of " user data can not be obtained correctly in a certain memory device 310 "
It is that in a certain memory device 310 mistake occurs for user data；In another scenario, " user data is in a certain memory device
310 are set can not correctly to be obtained " the reason of be that user data is stored in and can not access or will consume a certain of (wear out)
Memory device 310.If user data can not be obtained correctly in a certain memory device 310, S106 is entered step；If with
User data all can be obtained correctly in any memory device 310, then enters step S112.
In step s 106, with bit location 500 according to same position information recovery user data.
In step S108, judge whether user data is stored in a certain memory device 310 that can not be accessed.If user
Data are stored in the memory device 310 that can not be accessed, then enter step S116；If user data, which is not stored in, to be accessed
Memory device 310, then enter step S110.
In step s 110, it will be unable to the mark token of the memory device 310 where the user data correctly obtained
Record is in the update list L1 of control table TB.
In step S112, user data is read to data buffer 400.
In step S114, judge to update whether list L1 does not record.If update list L1 is not recorded, enter step
Rapid S116；If update list L1 has record, S118 is entered step.
In step S116, from 400 transmitting user data of data buffer to host interface 600, and it is performed simultaneously one and searches
Seek reading program.Reading program is searched to find other memory devices 310 for needing to be updated.
In step S118, from 400 transmitting user data of data buffer to host interface 600, and user is updated simultaneously
Data.
In the step s 120, any other newer memory device of needs is judged whether there is by searching reading program
310.If there are the needs of a certain memory device 310 to be updated, S122 is entered step；If being needed without any memory device 310
It is to be updated, then terminate flow.
In step S122, it would be desirable to which the identifier record for the memory device 310 being updated is in update list L1.
Fig. 8 is please referred to, the flow chart of the wiring method of the storage system 1000 according to an embodiment is painted.In step
In S202, master controller 100 receives a writing commands.Writing commands are being written a user data to memory array 300.It is main
Multiple pages of controller 100 and configurable memory array 300 store user data.
In step S204, Memory Controller 200 receives user data from host interface 600, and deposits to data buffer storage
Device 400.
In step S206, judge whether the configured page can not be accessed in a certain memory device 310.If being matched
The page set can not be accessed in a certain memory device 310, then enter step S210；If the page configured is not a certain
Memory device 310 can not be accessed, then enter step S208.
In step S208, by user data and the page of corresponding same position information storage extremely configuration.
In step S210, other than the memory device 310 that can not be accessed, by user data and corresponding same position
Data are stored to the page of configuration.
In step S212, judge that heating repairs whether list L2 does not record.If heating is repaired list L2 and is not recorded,
Then enter step S218；If list L2 is repaired in heating has record, S214 is entered step.
In step S214, judge whether heating repair procedure is completed.If heating repair procedure is completed, enter step
S216；If the repair procedure that heats up does not complete, enter S220.
In step S216, the identifier that will be unable to the memory device 310 of access is moved to from heating reparation list L2
Restore list L3.
In step S218, user data is restored into memory array 300.This step will be explained in the flow of Fig. 9
Figure.
In step S220, it is confirmed whether that also any memory device 310 can not be accessed.This step will be explained in
The flow chart of Figure 10.
Fig. 9 is please referred to, the flow chart of the step S218 of Fig. 8 is painted.In step s 302, judge whether restore list L3
Do not record.If restoring list L3 not record, S314 is entered step；If restoring list L3 has record, enter step
S304.Step S314 is similar to step S220.
In step s 304, with bit location 500 according to same position information recovery user data.
In step S306, the user data restored is restored in memory array 300.
In step S308, judge whether to receive other orders.If receiving other orders, terminate this flow；If not yet
Other orders are received, then enter step S310.
In step S310, judges whether user data has restored and finish.It is finished if user data has restored, enters step
Rapid S312；If user data is not restored and finished, S304 is entered step.
In step S312, removes and restore list L3.
Figure 10 is please referred to, the flow chart of the step S314 of Fig. 8 is painted.In step S402, each memory device is obtained
Set 310 predefined parameter.This predefined parameter can be an erasing times.
In step s 404, judge whether the predefined parameter of any memory device 310 has reached a heating point condition
(heating point condition).For example, heating point condition is that erasing times reach a predetermined value.If any deposit
The predefined parameter of reservoir device 310 reaches heating point condition, then enters step S406；If without any memory device 310
Predefined parameter reaches heating point condition, then terminates this flow.
In step S406, judge that heating repairs whether list L2 does not record.If heating is repaired list L2 and is not recorded,
Enter step S410；If list L2 is repaired in heating has record, S408 is entered step.
In step S408, the identifier record that predefined parameter is reached to the memory device 310 of heating point condition is rising
Temperature is repaired in list L2.
In step S410, the identifier record that predefined parameter is reached to the memory device 310 of heating point condition is heating up
It repairs in list L2, and executes heating repair procedure.
In conclusion although the present invention is disclosed as above with preferred embodiment, however, it is not to limit the invention.Ability
Field technique personnel without departing from the spirit and scope of the present invention, can make various improvement and modification.Therefore, protection of the invention
Subject to range ought be defined depending on appended claims.
Claims (10)
1. a kind of read method of storage system, which is characterized in that the storage system includes a Memory Controller and one
Memory array, position information storage is in the memory array together, which includes multiple memory devices, and the reading
The method is taken to include：
A reading order is received from a host interface, the reading order is asking the number of users for being stored in the memory array
According to；
When the user data is in one of these memory devices generation mistake, according to this with position information, the use is restored
User data；
The user data restored is transmitted to the host interface, and updates the user data.
2. the read method of storage system according to claim 1, which is characterized in that further include：
One identifier record of the memory device of the mistake with the user data is updated into list the one of a control table,
The control table is stored in the memory array.
3. the read method of storage system according to claim 1, which is characterized in that further include：
An identifier record of one of these memory devices of a heating repair procedure will be carrying out in a control
List is repaired in one heating of table, which is stored in the memory array；And
When a heating repair procedure executed finishes, the user data that has restored is transmitted to the host interface, and execute one and search
Seek reading program.
4. a kind of wiring method of storage system, which is characterized in that the storage system includes a Memory Controller and one
Memory array, for position information storage in the memory array, which includes multiple memory devices together, and should
Wiring method includes：
A writing commands are received, the writing commands are being written a user data in the memory array；
Multiple pages of the memory array are distributed to store the user data；
If these assigned pages can not be into line access, in addition to that can not be deposited in one of these memory devices
Other than the memory device taken, these pages store the user data and its it is corresponding this with position information；
A heating repair procedure is executed can not be into the memory device of line access；And
After the completion of the heating repair procedure, the user data is restored to the memory array.
5. the wiring method of storage system according to claim 4, which is characterized in that further include：
An identifier record of one of these memory devices of the heating repair procedure will be carrying out in a control
List is repaired in one heating of table, which is stored in the memory array.
6. the wiring method of storage system according to claim 4, which is characterized in that further include：
When the heating repair procedure executed finishes, which is repaired list from the heating moves to a restoring list；And
When the user data has restored, which is removed from the restoring list.
7. the wiring method of storage system according to claim 4, which is characterized in that further include：
Judge whether that also any of these memory devices needs to be performed the heating repair procedure, wherein judging whether also have
The system of any the step of needing to be performed the heating repair procedure of these memory devices is judged according to an erasing times.
8. a kind of storage system, which is characterized in that including：
One Memory Controller；And
One memory array, including multiple memory devices, wherein position information storage is in the memory array together；
Wherein the control table includes a update list, when in one of these memory devices mistake occurs for the user data
When, the first identifier symbol of one of these memory devices of mistake with the user data is recorded in the more newname
It is single.
9. the storage system according to claim 8, which is characterized in that the control table further includes a heating and repairs name
It is single, it, can not be into these storages of line access when the user data can not be in one of these memory devices into line access
The one second of one of the device device identifier record is repaired in the heating in list.
10. the storage system according to claim 9, which is characterized in that the control table further includes a restoring list, when
A heating can not be finished into the memory device executed of line access and restores program, and second identifier symbol is from the heating reparation
List moves to the restoring list.
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| CN201710197249.XA CN108664209A (en) | 2017-03-29 | 2017-03-29 | Storage system and its read method and wiring method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115561622A (en) * | 2022-10-14 | 2023-01-03 | 安测半导体技术(江苏)有限公司 | Method and system for writing unique ID in chip test |
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| CN102227779A (en) * | 2008-10-28 | 2011-10-26 | 美光科技公司 | Error correction in multiple semiconductor memory units |
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